Sending mailings to your own base

Looking for someone who has their own legitimate database of Polish individuals' e-mails, which could send them (to start with one time) a mailing encouraging them to join the fan club of a travel portal. The desired base is people aged 20 years and above, interested in tourism and travel in Poland, but this is not a requirement. I depend on a base of min. 10 thousand emails. Please give me the total amount for the service - I will do the content and graphics for the mailing myself